/***********************************************************************************************************************
* DISCLAIMER
* This software is supplied by Renesas Electronics Corporation and is only 
* intended for use with Renesas products. No other uses are authorized. This 
* software is owned by Renesas Electronics Corporation and is protected under 
* all applicable laws, including copyright laws.
* THIS SOFTWARE IS PROVIDED "AS IS" AND RENESAS MAKES NO WARRANTIES REGARDING 
* THIS SOFTWARE, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING BUT NOT 
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* AND NON-INFRINGEMENT.  ALL SUCH WARRANTIES ARE EXPRESSLY DISCLAIMED.
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* FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR 
* ANY REASON RELATED TO THIS SOFTWARE, EVEN IF RENESAS OR ITS AFFILIATES HAVE 
* BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
* Renesas reserves the right, without notice, to make changes to this software 
* and to discontinue the availability of this software.  By using this software, 
* you agree to the additional terms and conditions found by accessing the 
* following link:
* http://www.renesas.com/disclaimer
*
* Copyright (C) 2013 Renesas Electronics Corporation. All rights reserved.
***********************************************************************************************************************/

/***********************************************************************************************************************
* File Name    : r_cg_sbrk.c
* Version      : Applilet4 for RX64M V1.00.00.00 [02 Aug 2013]
* Device(s)    : R5F564MLHxFC
* Tool-Chain   : CCRX
* Description  : Program of sbrk.
* Creation Date: 07/02/2014
***********************************************************************************************************************/

/***********************************************************************************************************************
Pragma directive
***********************************************************************************************************************/
/* Start user code for pragma. Do not edit comment generated here */
/* End user code. Do not edit comment generated here */

/***********************************************************************************************************************
Includes
***********************************************************************************************************************/
#include "r_cg_macrodriver.h"
#include <stddef.h>
#include <stdio.h>
#include "r_cg_sbrk.h"
#include "r_cg_userdefine.h"

/***********************************************************************************************************************
Global variables and functions
***********************************************************************************************************************/

int8_t  *sbrk(size_t size);

extern int8_t *_s1ptr;

union HEAP_TYPE
{
    int16_t  dummy ;            /* Dummy for 4-byte boundary */
    int8_t heap[HEAPSIZE];      /* Declaration of the area managed by sbrk */
};

static union HEAP_TYPE heap_area ;

/* End address allocated by sbrk    */
static int8_t *brk = (int8_t *) &heap_area;

/**************************************************************************/
/*      sbrk:Memory area allocation                                       */
/*      Return value:Start address of allocated area    (Pass)            */
/*                       -1                             (Failure)         */
/**************************************************************************/
int8_t *sbrk(size_t size)                       /* Assigned area size   */
{
    int8_t  *p;

    if (brk+size > heap_area.heap + HEAPSIZE)   /* Empty area size      */
    {
        p = (int8_t *)-1;
    }
    else
    {
        p = brk;                                /* Area assignment      */
        brk += size;                            /* End address update   */
    }

    return p;
}

/* Start user code for adding. Do not edit comment generated here */
/* End user code. Do not edit comment generated here */
